Men's thermal active bluza 4F M100 dark red 4FWAW25UBRUM100 61S XL

On a crisp morning trail run or during a high-intensity gym session, this men's thermoactive base layer shirt from 4F keeps you dry and comfortable. The dark red long-sleeve top in size XL is engineered for active layering, using 4F Dry technology to wick moisture away from the skin and speed up evaporation. Its fitted cut and stretch fabric move with you, while flatlock seams prevent chafing during repetitive motion. A reflective 4F logo adds visibility for early or late workouts.

Key specifications

• Material: 92% polyester, 8% elastane – lightweight, breathable, and stretchy
• Technology: 4F Dry – moisture-wicking and quick-drying
• Fit: Fitted, with long sleeves and round neck
• Seams: Flatlock construction to reduce friction
• Thermal properties: Breathable, moisture-wicking, thermal comfort
• Details: Reflective 4F logo
• Care: Machine wash at 30°C, do not tumble dry, do not bleach

Why choose it

This base layer is built for multi-season use, from cool mornings to intense indoor training. The polyester-elastane blend offers four-way stretch and retains its shape, while the dark red color adds a bold touch to your workout wardrobe. It works equally well as a standalone top in mild weather or as a first layer under a jacket in colder conditions.

Ideal use cases

• Running and jogging in cool or variable weather
• Gym workouts, cross-training, and fitness classes
• Hiking and trekking as a moisture-managing base layer
• Skiing and snowboarding under a mid-layer
• Everyday active wear for commuting or casual sports

Good to know

The 4F Dry technology actively pulls sweat away from your skin, keeping you dry even during intense effort. Flatlock seams lie flat against the body to minimize irritation, and the reflective logo enhances safety in low-light conditions. This shirt is a versatile addition to any active wardrobe.